The USCG Office of Design and Engineering Standards issued guidance on the use of fixed fire pumps in lieu of portable fire pumps on Subchapter C and Subchapter M towing vessels, 65 feet or less.
The guidance comes with the Policy Letter 01-19: ‘Equivalency Determination – Fire Pumps for Subchapter C and Subchapter M Towing Vessels’.
When developing the 2003 interim rule and 2004 final rule addressing fire-suppression systems and voyage planning for towing vessels, the Coast Guard assumed smaller...
https://safety4sea.com/uscg-guidance-on-fixed-fire-pumps-for-towing-vessels/